Filled-bag sewing machine



Sept. 28 1926. V I 1,601,557

N. v. CHRISTENSEN FILLED BAG SEWING MACHINE Filed Dec. 31. 1921 s Sheets-Sheet 1 Sept. 28 1926.

N. V. CHRISTENSEN FILLE D BAG SEWING MACHINE Filed Dec. 31. 1921 3 Sheets-Sheet 2 Sept; 28, 1926. w 1,601,557

' N. V. CHRISTENSEN FILLED BAG SEWING MACHINE F'il ed Dec. 51 1921 3 Sheets-Sheet 5 to provide Patented Sept. 28. 1926.

UNIQIED STATES PATENT OFFICE.

NORMAN V. CHRISTENSEN, OF CHICAGO,

ILLINOIS, ASSIGNOR TO UNION SPECIAL i IIIACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS FILLED-BAG SEWING MACHINE.

Application filed December 31, 1921. Serial No. 526,116.

The invention relates to new and useful I improvements in sewing machines, and more particularly to a sewing machine'for closing the mouth of a filled bag.

An object of the invention is to provide a machine of the above type wherein the bag is stationary and the mouth thereof supported in proper position for stitching, and wherein the stitching mechanism travels across the bag mouth during the stitching thereof.

A further object of the invention is to provide a machine of the above type,wherein the sewing machine is mounted on a carriage which in turn is mounted on ball bearing wheels, so that the carriage may be propelled across the mouth of the bag by the feed dog of the sewing machine itself.

A further object of the invention is to provide a sewing machine of the above type, wherein the mouth of the bag is supported by a rail extending across the machine in a direction parallel with the tracks and between the overhanging arm of the sewing machine and the work support, and wherein said rail is provided with supporting devices adapted to engage and support the mouth of the bag.

A still further object of the invention is a supporting table for bags of large sizes, which table is adjustable so that the weight of the bag may rest on the table while the mouth of the bag is held supported by the rail for the sewing machine to travel across and stitch the same.

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In the drawings which show by way of illustration one embodiment of the invention- Figure 1 is a front view of a filled bag sewing machine embodying my improvements;

Figure 2 is a sectional view on the 22 of Fig. 1;

Figure 3 is a sectional view on the 33 of Fig. 1;

Figure 4: is a sectional view on the P-d of Fig. 1;

Figure 5 is a detailshowing the lever for applying a brake to the beltwh'eel of the line line

line

sewin machine and carrying the controlling switcli for the mot 1 Figure 6 is a View of the parts shown in Fig. 5 as seen from the right thereof;

The invention is directed broadly to a filled bag machine having a supporting frame preferably consisting of two spaced uprights which are connected by tracks adjacent the upper end thereof and a brace rod adjacent the lower end thereof. Mounted to 7 move back and forth on the tracks is a carrklso, mounted on the uprights is an adjustable table on which Mags of large sizes mav. be supported. This table can be set at dif ferent heights to accommodate the size of the bag being stitched. Also, fixed to the uprights is a rail which extends between the overlanging arm and the work'support and above the path of reciprocation of the needle. This rail is provided with suitable supporting devices which engage the mouth of the bag and hold the same while the stitching mechanism travels across. mouth of the bag.

Referring more in detail to the drawings, my improved filled bag sewing machine comprises two spaced standards 1 and 2. Each standard is mounted in a supporting base bracket 3, which in turn'is carried by castors These supporting base brackets 3 are connected by a rod 5, which extends through the bracket and nuts 6 threaded on to the brace rod clamping the opposite faces of the brackets. This makes a rigid spacing support for the uprights. Each upright is provided with a bracket head 7. The bracket'head 7 has two upwardly projecting arms 8 and 9, see Fig. 2, which are'connected by a cross bar 10. Mounted in the arm 8 is a tubular rail 11. Also, mounted in the arm 9 is a tubular rail12. It is. understood that these tubular rails extending from one bracket head to the other are rigidly secured the thereto and form a rigid connection for the upper ends of the uprights.

Mounted to travel back and forth on the rails 11 and 12, which form a track, is a carriage 13. The carriage 13 includes a supporting frame 14 with a downwardly projecting bracket 15, see Fig. 2. The frame 14 is preferably mounted on three wheels 16, 17 and 18. In Figure 3, I have shown a sectional view through the wheel 17. These wheels are all similarly mount ed. Carried by the frame 14-, of the carriage 13 is a shaft 19 which projects later ally therefrom. Mounted on said shaft 19 is a collar 20. Also mounted on the shaft and at the end of the collar is a ball hearing 21. A. retaining collar 22 is then slipped on the end of the shaft and the parts are held thereon by means of a nut 23. The wheel 17 is formed with a concave periphery 24, which is adapted to lit the curvature of the tubular rail 11. Each wheel is similarly for ed and mounted and this provides a simple form of carriage which travels back and forth on the track formed by the rails 11 and 12. The three wheeled carriage will be firmly supported by the rails and at the same time will be very read ily moved on the rails owing to the ball bearings for the wheels.

Mounted on the depending bracket 15 is the sewing machine head 25. Said sewing machine head 25 includes the usual overhanging arm 26, the usual tubular work support 27, a stitching mechanism of which the reciprocating needle bar 28 is illustrated, the usual presser foot and feeding mechanism, the feeding mechanism being located in the work support 27 and including a four-motion feed dog 27 of the usual type.

Mounted on the upright 1 is a sleeve 29 which is adapted to slide freely on the up .righ This sleeve carries a bracket 30. preferably formed integral therewith, which bracket includes a horizontal arm 31 and a vertical arm 32. Also mounted on the upright 2 is a similar sleeve 29 which carries a bracket 30 provided with a horizontal arm 31 and a vertical arm 32. EX- tending between the arms 31 and 31 is a table 320. Said table is bolted to the arms by means of bolts 3333. Also carried by the arms 32 and 32 is a support 34- which is secured to the bracket arms by means of suitable screw bolts 85. The sleeves 29 and 29, as above noted, are adapted to slide freely on the uprights 1 and 2 and may be clamped in any desired position. by means of a setscrew 36 having a crank handle 37. whereby said screw may be turned.

Asa means for adjusting the table 320 up and down, I have provided sprocket chains 38, one at each side of the machine and these sprocket chains run over sprocket wheels 39 and are connected to counter-balancing weights 40. The sprocket wheels 39 are mounted on a shaft e1 extending from side to side of the machine and journaled' .have been released and thus the table positioned at any desired height. It will also be noted that the table projects forwardly from the uprights 1 and 2 so that it is readily accessible for the placing of the filled bag thereon and the sewing machine overhangs said table. The stitching line is substantially midway between the extreme front and rear ends of the table so that when the tilled bag is placed on the table and rests against the support 34, the mouth of the bag will be properly positioned for the sewing machine to travel across the same.

Extending between the overhanging arm and the work support is a supporting rail 1%. Said supporting rail i4 is rigidly secured to bracket arms 45 by means of bolts 46, see Fig. 4. The bracket arms l5 surround the uprights and are each secured thereto by a set screw 47. This supporting rail a l is held in fixed position, although it may be adjusted up and down, if desired. Carried by the supporting rail 14 and at suitable spaced distances along the same are supporting hooks or pins 48. These hooks or pins are preferably rigidly secured to the rail by means of bolts 50, Fig. 4. The hooks or pins 48 are so positioned as to height that the mouth of the bag may be hooked thereon and thus supporteth and while the mouth of the bag is thus supported the sewing machine may travel across the mouth of the bag and form a line of stitching therein. In Figure 1. I shown a filled bag B in broken lines, resting on the table 320 and secured by the hooks T8 and the line of stitching s in dothave ted lines, which has been formed by the sewing machine as it travels across the mouth of the bag in the direction indicated by the arrow in said figure.

The stitching mechanism and feeding mechanism of the machine are operated by a suitable driving shaft carrying a belt wheel 51. and a belt 53 running over the drivingwheel of the motor and the driving wheel 51 of the sewing machine rotates the main shaft thereof. Said driving belt runs over idlers 54, see Fig. 2. Mounted on the supporting bracket 15 is a lever 55. Said leveris pivoted at 56 to said bracket and capable ofbeing moved in a horizontal direct-ion. This lever carries a switch block 57 Which is operated by the finger pieces 58. Said switch block is connected to wires L leading to the motor and said motor can be stopped and started by means of this switch block 57. Mounted on the lever 55 is a brake shoe 59 which is adapted to engage the flange of the driving wheel 51 for stopping thesewing machine when the current is cut off. It will readily be seen that the operator by grasping the handle 60 of the lever 55 can control the switch and can move the lever so as to cause the driving shaft of the sewing machine to stop. The lever 55 is provided with a project-ing toe 61 which serves to limit the movement ofthe lever in an outward direction away from the driving wheel of the sewing machine.

While I have descrlbed the machine as particularly adapted for filled bags which are supported by the table 320, it is understood that in case the bags are small, the supporting hooks or pins &8 alone may be sufiicient to support the entire weight of the bag, in which case the table 320 would not be necessary. I have also illustrated. therefore, in Figure 1 a. small filled bag B which is indicated as having been stitched by a line of stitching s.

It is thought that the operation of my machine will be obvious from the description which has been given above. Vhen operating upon comparatively heavy filled bags, the table 320 is adjusted to the proper heightso that the mouth of the bag may be supported by the pins or hooks 48, while the bottom of the bag rests on the table 320 and supports the contents of the bag. Ihe carriage is moved to the extreme left of the bag before the bag is put in place and then the operator brings the sewing machine to a point where the extreme left-hand side of the mouth of the bag is underneath the presser foot and clamped against the feed dog. As the machine is started the feed will intermittently engage the fabric forming the mouth of the bag and as the bag is held stationary by the supporting rail it, the machine itself will move one step to the right: and thus it is that the sewing machine is caused to travel fromleft to right across the mouth of the bag, stitching the same. Owing to the fact that the carriage is mounted on ball bearing wheels and the rails are horizontal, or substantially so, the feed of the sewing machine. can readily cause the carriage to move step by step.

It will be noted that the bracket which carries the sewing machine extends downwardly between the rails forming the track to a considerable distance so that the center of weight of the bracket and sewing machine is well below the tracks and this will cause the carriage to firmly rest on the track as it moves back and forth.

It will be obvious that minor changes in the details of construction and the arrangement of the parts may be made without departing from the spirit of the invention as set forth in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is z 1. A filled bag sewing machine comprising a supporting frame structure, a track carried by said supporting frame structure, a carrier mounted on said track and freely movable back and forth thereon, a sewing head mounted on said carrier and depending therefrom, a motor .iounted on said carrier and connected to the sewing head for oper ating the same, said track being substantially horizontal whereby the feed of the sewing head operating upon the filled bag will move the carrier along said track, and a stationary filled bag support associated with said supporting frame structure. 7

2. A filled bag sewing machine including in combination, a'supporting frame, a track mounted on said supporting frame, a carrier mounted on said track and movable back and forth on said track in a straight line, a sewing head rigidly mounted on said carrier and having a stitching mechanism and a feeding mechanism, including a feed dog, said sewing head depending from the carrier and adapted to stitch the mouth of av filled bag supported beneath said track, said track being substantially horizontal whereby the feed dog of the sewing machine operating upon the fabric of the filled bagmay be utilized for moving the carrier during the stitching of the'bag.

8. A filled bag sewing machine including in combination, a supporting frame a track a mounted on said supportingframe, a support for the bag mounted on the frame beneath the track, means for raising and lowering the support, a carrier mounted on said track and freely movable back and forth thereon. in a straight line, a sewing head mounted on said carrier and having a stitching mechanism and a feeding mechanism including a feed dog, said sewing head depending from said carrier and adapted to stitch the mouth of a filled bag supported beneath said track, said track being substantially horizontal whereby the feed dog operating upon the filled bag may be utilized for moving the carrier during the stitching of the bag.

In testimony whereof, I aiiiX my signature.

NORMAN V. CHRISTENSEN. 

